1. a dirty, clumsy, untidy, or slovenly person ...1776 Scot.
2. a great deal of nonsensical gossip ...Bk1866 Scot.
3, a person much addicted to gossip; a rash, noisy talker ...Bk1866 Scot.
1. to give hasty utterance to; to blurt out; to talk foolishly;
to tell what ought to be kept secret ...1680 exc. Scot.
2. to make a noise in swallowing ...Bk1898 Scot.
3. to flow unsteadily as liquid from a bottle that is very full ...Bk1898 Scot.
vb. of onomatopoeic origin, with association of blurt, and perhaps of utter, mutter, etc.
FIRST DOCUMENTED USE
1680 - see Example below
"...If the Minister should blutter out any Errour or Undecency, and yet not restrain..."
From: Catholick Communion double defended by Dr. Owens
By; Richard Baxter, 1680
• A New English Dictionary on Historical Principles,
James Murray, 1887-1933
• The English Dialect Dictionary, Joseph Wright, 1898-1905
• The Dialect of Banffshire, with a Glossary of Words not in Jamieson's Scottish Dictionary, Rev. Walter Gregor, 1866
• An Etymological Dictionary of the Scottish Language,
John Jamieson, 1879-1887
• A Scots Dialect Dictionary, Alexander Warrack, 1911